Arc chute and load switch comprising same

Abstract

The present invention provides an arc chute, which can be provided to make close contact with a curved frame part, and a load switch comprising same, the arc chute comprising: two cover parts, which are arranged to be adjacent to the outer circumference of a frame part, are spaced apart from each other, and overlap each other in the axial direction of the frame part; and an arc grid which is arranged between the two cover parts so as to be coupled to each of the two cover parts, wherein the cover part is formed in a shape in which one side coming into contact with the outer circumference of the frame part corresponds to the outer circumference of the frame part.

The invention claimed is: 
     
         1 . An arc chute comprising:
 two cover parts spaced apart from each other, overlapping each other in one direction, and each having at least one side formed in a curved shape; and   an arc grid disposed between the two cover parts facing each other and coupled to each of the two cover parts, and   wherein the arc grid is provided in plurality,   wherein the arc grid comprises:   a grid base portion formed in a plate shape extending in a direction toward the cover parts; and   wherein the arc chute further comprises:   two grid legs extending from one side of the grid base portion, and   a fixed terminal part disposed adjacent to the cover parts;   a frame part formed in a column shape and accommodating a portion of the fixed terminal part; and   a movable contact accommodated inside the frame part to be rotatable centering on a central axis of the frame part,   wherein the grid legs extend to a radial inside of the frame part, and are formed such that a distance between one end thereof facing the radial inside of the frame part and the central axis of the frame part is shorter than a distance between the movable contact and the central axis of the frame part,   a grid concave portion is formed in a space between the two grid legs, and   a width of the grid concave portion is larger than a width of the movable contact.   
     
     
         2 . The arc chute of  claim 1 , wherein the plurality of arc grids are disposed along the one side of the cover part. 
     
     
         3 . The arc chute of  claim 2 , wherein the plurality of arc grids are disposed while maintaining a predetermined distance from a specific point. 
     
     
         4 . The arc chute of  claim 1 , further comprising:
 a fixed terminal part disposed adjacent to the cover parts and spaced apart from the arc grid; and   an arc runner disposed between the two cover parts facing each other, coupled to each of the two cover parts, disposed between the fixed terminal part and the arc grid, and having one portion in contact with the fixed terminal part,   wherein the plurality of arc grids are disposed so that lengths thereof are gradually decreased in a direction away from the fixed terminal part.   
     
     
         5 . The arc chute of  claim 4 , wherein the arc runner extends in a direction toward the fixed terminal part, and has one end portion, facing the fixed terminal part, bent in an opposite direction to the fixed terminal part, and
 the one portion in contact with the fixed terminal part is located at the one side based on a bending line of the one end portion.   
     
     
         6 . The arc chute of  claim 1 , wherein the movable contact rotates while passing through the grid concave portion when rotating in a direction away from or toward the fixed terminal part. 
     
     
         7 . The arc chute of  claim 6 , further comprising:
 a movable contact holder formed in a bar shape extending in a radial direction of the frame part and having the movable contact on one end portion thereof; and   a puffer guide formed in a column shape extending in the radial direction of the frame part, having a hollow formed therein to accommodate the movable contact holder, and having the movable contact disposed on an outside thereof.   
     
     
         8 . The arc chute of  claim 1 , wherein a center line of the two grid legs is spaced apart from a center line of the arc grid to be biased with respect to the arc grid. 
     
     
         9 . The arc chute of  claim 8 , wherein the arc grid is provided in plurality,
 the plurality of arc grids are disposed in a predetermined direction, and   the grid legs disposed on two of the arc grids adjacent to each other are disposed so as not to overlap each other in the predetermined direction.   
     
     
         10 . The arc chute of  claim 1 , wherein the arc grid is provided with an arc hole formed therethrough in a thickness direction. 
     
     
         11 . The arc chute of  claim 10 , wherein the arc hole of the arc grid is provided in plurality. 
     
     
         12 . A load switch comprising:
 an opening and closing part including a fixed terminal part and a movable terminal part;   a frame part accommodating a portion of the fixed terminal part;   a rotating shaft rotatably coupled to the frame part, and connected to the movable terminal part to rotate together with the movable terminal part; and   an arc chute disposed adjacent to the fixed terminal part,   wherein the arc chute comprises:   two cover parts spaced apart from each other, overlapping each other in one direction, and each having at least one side formed in a curved shape; and   an arc grid disposed between the two cover parts facing each other, coupled to each of the two cover parts, and spaced apart from the fixed terminal part, and   wherein the arc grid is provided in plurality, and   wherein the movable terminal part includes a movable contact accommodated inside the frame part to be rotatable centering on a central axis of the rotating shaft,   the arc grid comprising:   a grid base portion formed in a plate shape extending in a direction toward the cover parts; and   two grid legs extending from one side of the grid base portion to a radial inside of the frame part,   the grid legs are formed such that a distance between one end facing the radial inside of the frame part and the rotating shaft is shorter than a distance between the movable contact and the rotating shaft,   a grid concave portion is formed in a space between the two grid legs, and   the grid concave portion has a width larger than that of the movable contact, such that the movable contact rotates while passing therethrough.   
     
     
         13 . The load switch of  claim 12 , wherein the plurality of arc grids are disposed along the one side of the cover part. 
     
     
         14 . The load switch of  claim 13 , wherein the plurality of arc grids are disposed while maintaining a predetermined distance from a specific point. 
     
     
         15 . The load switch of  claim 12 , wherein the plurality of arc grids are disposed so that length thereof are gradually decreased in a direction away from the fixed terminal part. 
     
     
         16 . The load switch of  claim 12 , wherein the arc chute comprises an arc runner disposed between the two cover parts facing each other, coupled to each of the two cover parts, disposed between the fixed terminal part and the arc grid, and having one portion in contact with the fixed terminal part. 
     
     
         17 . The load switch of  claim 16 , wherein the arc runner extends in a direction toward the fixed terminal part, and has one end portion, facing the fixed terminal part, bent in an opposite direction to the fixed terminal part, and
 the one portion in contact with the fixed terminal part is located at a radial inside of the frame part based on a bending line of the one end portion.   
     
     
         18 . The load switch of  claim 12 , further comprising:
 a movable contact holder formed in a bar shape extending in a radial direction of the frame part and having the movable contact on one end portion thereof; and   a puffer guide formed in a column shape extending in the radial direction of the frame part, having a hollow formed therein to accommodate the movable contact holder, and having the movable contact disposed on an outside thereof.   
     
     
         19 . The load switch of  claim 12 , wherein the arc grid comprises:
 two grid legs extending from one side of the grid base portion to a radial inside of the frame part, and   the grid legs disposed on two adjacent arc grids are disposed so as not to overlap each other in a circumferential direction of the frame part.